If you make it longer on the pivot side of the pedal as well as the bottom you can keep the proportions the same . here's an example: if your current pedal is 6:1 and the center to center dimensions are 2" from pivot to pushrod, and 12" from pushrod to pedal pad, then you could add the 6" from the pushrod to the pedal pad, making it 18" . you would then add 1" to the length between pushrod and pivot making it 3". then it is 18:3 or 6 :1. you would have to move the upper mount up 1" to keep the M/C in the same place. I would make a new pedal if I was going to go to all that trouble. hope this helps, mikey